java.lang.VerifyError: Bad type on operand stack

This is very strange and I've had this problem for a while and I'm honestly out of ideas.

So, I'm trying to play modded mc and here's how it goes. I start up forge and it proceeds normally, but when it loads up to the menu it freezes, then goes to a loading screen, then crashes. I'm new to this and want to play just play modded really.